Drive unit for fitting or retrofitting a bicycle

Abstract

The invention relates to a drive unit for fitting or retrofitting a two-wheeled vehicle (1), preferably a bicycle, having an electric motor which is designed as a disc motor (10), comprising a rotor disc (11) having permanent magnets (12) and an annular stator (13) with windings, which generate an electrical alternating field for driving the rotor disc (11), wherein the rotor disc (11) can be fastened non-rotatably to a receptacle (6) on the front or rear wheel of the two-wheeled vehicle (1) and the annular stator (13) can be fastened to a frame part (4, 5) of the two-wheeled vehicle (1). For tool-free dismantling the annular stator (13) can be unfolded in the circumferential direction and can be removed or pulled off from the rotor disc (11).

Dependencies are inferred from the claim text.